Chain-wrench



s. MOR EAU.

CHAIN WRENCH.

(No Model.)

No. 533,548. Patented Feb. 5,1895.

unwind/A Unwrap STATES PATENT trips.

SAMUEL MOREAU, OF IRONVVOOD, MICHIGAN.

CHAIN-WRENCH.

SPECIFICATION forming part of Letters Patent No. 533,548, dated February5, 1 895. PP Decemhcr 6, 1893. Renewed December 28, 1894. Serial No.533,232. (No model.)

To cull whom it may concern:

Be it known that I, SAMUEL MORE-AU, a citizen of the United States,residing at Ironwood, in the State of Michigan, have invented certainnew and useful Improvements in Chainrenches, reference being had to theaccompanying drawings, forming part of this specification.

My present invention has relation to that class of wrenches in which anadjustable chain is employed to pass around the pipe or other article tobe turned, this chain co-operating with the wrench head in enabling thearticle to be firmly held as the wrench is operated. The object of myinvention is to improve this construction of chain wrenches and moreparticularly to provide improved means whereby the adjustment of thechain can be readily effected and whereby the wrench can be more firmly,quickly and securely caused to grip the pipe or like article withoutdanger of slipping, than is possible with any other wrench of which I amaware.

The novel features of my invention will be hereinafter described, withreference to the accompanying drawings wherein the same is illustratedand will be particularly pointed out in the claims at the end of thisspecification.

Figure 1 is a view in side elevation of a wrench embodying my invention.Fig. 2 is a view in vertical central section. Fig. 3 is a section online 3-3 of Fig. 2. Fig. 4: is adetail section of the adjusting sleeve.Fig. 5 is a detail edge view of the lower part of the body showing partof the chain. Fig. 6 is a detail front view of part of the chain.

A designates the body of my improved wrench that is provided at one endwith a suitable handle a and at its opposite end with means whereby thechain B may have one of its ends anchored thereto and may have its otherend detachably connected thereto. In order to effect the connection ofthe chain B, I prefer to slot or bifurcate the end of the body A and toform this end with the perforation a through which passes a belt a? thatpasses through one end of the link I) of the chain B, it beingunderstood that the end of the link I) enters the slotted end of thebody A in order to bring the perforation of the link coincident with thehole a. This end of the body A is also provided with two sets of claws aeach set of claws extending parallel to each other and being separated asufficient distance to admit the chain 13. The chain B is formedpreferably of forged steel links of the construction shown, the pintlesor pivot bolts of the links of which the free end of the chain isformed, extending laterally a sufficient distance to enter the spaces a.between the claws a Upon the body A of the wrench is mounted the head orbox 0, this head being held in manner free to slide upon the body A andbeing provided with a through bolt 0 that passes through a long slot aformed in the body A. The head or box C has its edges cut away to permitthe passage of the claws a and the chain B,and is provided with theserrated extensions c preferably curved in outward direction as shownand with the plain oppositely extending portions 0 The extension 5: areseparated a sufficient distance from each other to span the lower edgeof the body A and to permit the chain claws to pass freely therethroughand by thus forming the head of box C with the extensions as shown asquare and firm bearing is afforded whereby the wrench is enabled tosecurely and effectively grasp the pipe or other article on which theyare to be used, and with the broad square bearing thus formed all dangerof turning or slipping of the wrench is guarded against even whenoperating on perpendicular pipes.

The body is formed with a threaded portion a with which engages thethreads d formed upon the interior of the sleeve D through which thebody A passes. The sleeve D has its outer face formed preferably withannular ridges or knurls d to permit the sleeve to be readily turned andat one end of this sleeve is formed an annular groove d to receive thelug or extension 0 that is formed at one end of the head or box 0. Henceit will be seen that when it is required to shift the head or box 0 uponthe body A it is only necessary to turn the sleeve D either upward ordownward. By preference the claws a at the end of the body A are formedat such distance apart as to engage the two adjacent operated upon thehead or box 0 will be placed thereon with the extension 0 and extensionsorguards 0 bearing squarely thereon after which the chain B will bepassed around the pipe and its free end will be engaged by the claws aIn order now to tighten the wrench the sleeve Dwill be turned downwardthereby causing the body A to move outward from the pipe and thus givethe desired tension to the chain B. By providing the wrench with theguards or extensions 0 not only is the wrench more squarely held uponthe pipe or other article but by the bearing of these extensions uponthe pipe as the wrench is turned backward the teeth of the wrench areprotected from contact with the pipe; and these extensions 0 also aid inpreventing the chain from becoming disconnected. The adjustment of thehead or box 0 is manifestly of great importance because it enables thechain to be tightened to the desired extent quickly and without thenecessity of disconnecting it. It will also be seen that the head or box0 affording a broader bearing upon the pipe or like article greatlystrengthens the wrench at the point where it is subjected to excessivestrain.

It is manifest that the details of construc tion above set out may bevaried without departingfromthespiritoftheinvention. Thus while I regardthe construction of chain shown, as the preferred one, it is obviousthat other forms of chain might be used and that the precise shape ofthe parts as illustrated in the accompanying drawings may be modifiedwithin wide limits.

Having thus described the invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A chain wrench comprising a body provided at one end with means forconnectinga chain thereto and with a head orbox mounted upon said bodyand adjustable upand down thereon and extending beyond the same so as tobear upon the article to be turned, and a chain connected to said body,substantially as described.

2. A chainwreuch comprising a body provided at one end with a handle andat its other end with means for connecting the chain to said body and abox or head adjustably mounted upon said body and projecting beyond thesame so as to bear upon the article to be turned, said box or head beingadjustable up and down upon said body without revolving' and means forholding said box or head at different positions upon said body,substantially as described.

3. A chain wrench comprising a body provided with a handle at one endand provided at its opposite end with a chain and with suitable claws todetaohably hold one end of said chain and a head or box arranged to bearon the article to be turned and adjustable up and down upon said body,and through which said body passes, substantially as described.

4. A chain wrench comprising a body having one end of achain attachedthereto and provided with a suitable laterally projecting portion toengage the other end of said chain and a head or box mounted upon saidbody and adjustable up and down thereon and proj ecting beyond the sameto engage the article to be turned, substantially as described.

5. A chain wrench comprising a body A having one end of the chainattached thereto and provided with means for detachably engagingtheother end of said chain, a head or box extending beyond said body toengage the article to be turned, and means for adjusting said head orbox up or down upon said body of the wrench,substantially as described.

, 6. A chain wrench comprising a body pro- Vided withmeans forconnecting the chain thereto, a head or box through which said bodypasses and which is provided with a projecting portion to bear againstthe article to be turned, and a threaded sleeve engaging a correspondingthreaded portion of said body, said sleeve being arranged to shift saidhead or box, substantially as described.

7. A chain wrench comprising a body provided with means for connectingthe chain thereto a head or box through which said body passes and whichis provided with a serrated bearing portion, and a threaded sleeveengaging a corresponding threaded part of said body, said sleeve beingconnected to said head or box, substantially as described.

8. A chain wrench comprising a body having at one end a handle andhaving at its opposite end claws for engaging the chain and providedalso with screw-threads and with a slot, a head or box through whichsaid body passes, said head or box being provided with a bolt passingthrough the slot of said body, and a sleeve adjustably mounted upon thethreaded portion of said body and engaging said head or box,substantially as described.

9. A chain wrench comprising a body provided with 'a chain attachedthereto and a head or box adj ustably mounted on said body, said head orbox being provided with a serrated extension 0, and with an oppositeplain extensionc substantially as described.

10. A chain wrench comprising a body A provided with the claws a a heador box 0 movably mounted upon said body A and having the extensionsc and0 said head or box being cut away opposite said claws a and a sleeve Dadjustably mounted upon said body A, substantially as described.

. SAMUEL MOREAU.

Witnesses: I

CURTIS BUoK, BELMONT WAPLES.

